Method of casting radiator sections and the like



Dec. 1, 1925.

C. B..SEEM

METHOD OF CASTING RADIATOR SE CTI ONS AND THE LIKE Original Filed 001.. v, 1924 gwwzntoz O- B. 638W Patented Dec. 1, 1925.

UNITED STATES 1,564,185 PATENT OFFICE.

a CHARLES B. SEEM, OF WILLIAMSPOBT, PENNSYLVANIA.

METHOD OF CASTING RADIATOR SECTIONS AND THE LIKE.

Original application filed October 7',

To all whom it may concern:

Be it known that I, CHARLES B. SEEM, a citizen of the United States, residing at Villiamsport, in the county of Lycoming and State of Pennsylvania, have invented certain new and useful Improvements in Methods of Casting Radiator Sections and the like, of which the following is a specification.

The present inventionrelates to an improved method of casting radiator sections and the like using permanent molds for carrying out the same, this being a divisional application of my' copending application for ermanent molds, Ser. No. 742,141, filed ctober 7, 1924.

The usual method of producing radiator section castings is to provide individual molds built up in sand for each casting which is a very costly and tedious pro cedure.

The introduction of my molds and process for doing the work in radiator plants and other duplicating foundries, independent of what kind of metals or alloys are employed, means a considerable saving in time and labor, and a consequent reduction in prices of the articles so produced.

In carrying out my invention I make use of a two-piece metal mold, having a collapsible core, such asbaked sand suspended in a fixed position in the hollow part of the mold between the cope and the drag.

The mold employed for carrying out this process is illustrated in the accompanying drawing in wh'ch 1 Fig. 1 reprcs bnts a top plan view of the mold;

Fig. 2 an end view of Fig. 1, partly in section with the mold closed;

Fig. 3 alongitudinal section along line 13-41 of Fig. 1 with the core and casting in position Fig. 4 a plan view of the mold 0 en exposing the recesses and channels for t e castmg; and

Fig. 5 a cross section along line 55'of Fig. 1. I

In the drawing, reference numeral 10 -represents the cope or top half of the mold,

and reference numeral 11 the drag or bot tom part thereof. For radiator sections both halves are identical and have been shown such in the drawing, but it is evident that the cope and the drag may have entirely difi'erent cavities depending on the 1924, Serial No. 742,141.

Serial No. 26,209.

section and contour of the casting for which the mold is intended. The mold is to be properly vented and is preferably of rectangular form, the two halves beinghinged together along one side as at 12 and provided with clips or clamps 13 on the other side. The hollow portion of the mold consists of recesses 14 in each half for the body of the radiator section and channels 15 for the radiating fins thereon. Shallow depressions 16 may also 7 be provided to form bridges between the walls of the casting and at each end is furnished a pocket 1( for forming the contacting pads 25 between the sections. In order to properly position the core in length direction of the mold these pockets 17 may have a smaller concentric de ression as at 18.

Suflicient' metal is provided outside the main recess 14 along all edges of the mold so that the surfaces 19 at the central dividing plane of the mold make proper contact to prevent leakage. At 20 is shown the gate, one half on each side of the dividing plane. From this gate leads 21 radiate and open into the main recess 14. The core 22 is collapsible and consists preferably oft hard packed sand into which are baked short metal pins or chaplets 23 which are of a length corresponding to the height of the cavity of themold so that the ends of the chaplets abut against the top and bottom of the cavity. In this manner the core becomes freely suspended in the cavity so that walls 26 of even thickness are obtained in the casting. As already described the core may be positioned accurately in length direction by engaging with suit-- able lugs 24 in the depressions 18.

The interior surfaces of the mold such Divided and this application filed April I as-the recesses 14;, channels 15 and pockets metal is then started by the aid of either pneumatic pressure, vacuum or gravity.

As soon as the casting has been completed and the metal has become solid the locking clamps 13 are removed and the cope 1O swung open or raised, thus exposing the casting which then may be lifted out of the drag 11. The core 22 is next taken out through the end openings at 18 and the interior of the casting cleaned in the usual manner. The pins or supporting inserts 23 will then remain in the casting and form sugports for the walls.

ome of the advantages gained by the use of this casting method are practically perfeet castings and no chipping or dressing necessary as the Chaplets are permitted to remain-1n the casting supporting the walls.

What I claim as new is: A method of producing metal castings consisting in first carbonizing the cavities of a metal mold; second placing inserts in the core of the mold adapted to hold the core in position. but primarily to act as suporting braces for the cast Walls; third heatmg the mold to prevent chilling; fourth pouring metal-into the mold and lastly removing the core from the casting when solid permitting the inserts to remain in the castlng. a

In testimony whereof I aifix my signature.

CHARLES B. SEEM. 

